<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li class="search-item border-bottom"
                v-for="item of list" 
                :key="item.id"
                @click="handleCityClick(item.name)">{{ item.name }}</li>
                <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name: 'CitySearch',
    props:{
        cities: Object
    },
    data () {
        return {
            keyword : '',
            list : [],
            timer: null
        }
    },
    methods: {
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    computed:{
        hasNoData () {
            return !this.list.length
        }
    },
    watch :{
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer)
            }
            if (!this.keyword){
                this.list = []
                return 
            }
            this.timer = setTimeout(()=>{
                const result = []
                for(let i in this.cities) {
                    this.cities[i].forEach((value)=> {
                        if (value.spell.indexOf(this.keyword) > -1 || 
                        value.name.indexOf(this.keyword) > -1) {
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    mounted (){
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .search
      height .72rem
      padding 0 .1rem
      background $bgColor
      .search-input
        box-sizing border-box
        height .62rem
        width 100%
        padding 0 .1rem
        line-height .62rem
        text-align center
        border-radius .06rem
        color #666
    .search-content
      z-index 1
      overflow hidden
      position absolute
      top 1.58rem
      left 0
      right 0
      bottom 0
      background #eee
      .search-item
        line-height .62rem
        padding-left .2rem
        color #666
        background #fff

</style>
